summaryrefslogtreecommitdiff
path: root/src/credential
diff options
context:
space:
mode:
authorSchanzenbach, Martin <mschanzenbach@posteo.de>2019-03-12 09:46:51 +0100
committerSchanzenbach, Martin <mschanzenbach@posteo.de>2019-03-12 09:46:51 +0100
commitdbccb37562c243c5099ec07a602a437f6e985a1e (patch)
treeb9f60403534e0335080c6a34fe5f8935a59aa7ae /src/credential
parent1057efede9f4d08ff9d215162a7ebdeea4869e20 (diff)
move disfunc credential
Diffstat (limited to 'src/credential')
-rw-r--r--src/credential/plugin_rest_credential.c1152
1 files changed, 1152 insertions, 0 deletions
diff --git a/src/credential/plugin_rest_credential.c b/src/credential/plugin_rest_credential.c
new file mode 100644
index 000000000..78267b54e
--- /dev/null
+++ b/src/credential/plugin_rest_credential.c
@@ -0,0 +1,1152 @@
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2012-2016 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @author Martin Schanzenbach
+ * @file credential/plugin_rest_credential.c
+ * @brief GNUnet CREDENTIAL REST plugin
+ *
+ */
+
+#include "platform.h"
+#include "gnunet_rest_plugin.h"
+#include <gnunet_identity_service.h>
+#include <gnunet_gnsrecord_lib.h>
+#include <gnunet_namestore_service.h>
+#include <gnunet_credential_service.h>
+#include <gnunet_rest_lib.h>
+#include <gnunet_jsonapi_lib.h>
+#include <gnunet_jsonapi_util.h>
+#include <jansson.h>
+
+#define GNUNET_REST_API_NS_CREDENTIAL "/credential"
+
+#define GNUNET_REST_API_NS_CREDENTIAL_ISSUE "/credential/issue"
+
+#define GNUNET_REST_API_NS_CREDENTIAL_VERIFY "/credential/verify"
+
+#define GNUNET_REST_API_NS_CREDENTIAL_COLLECT "/credential/collect"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_EXPIRATION "expiration"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_KEY "subject_key"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_EGO "subject"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL "credential"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_TYPEINFO "credential"
+
+#define GNUNET_REST_JSONAPI_DELEGATIONS "delegations"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR "attribute"
+
+#define GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_ATTR "credential"
+
+/**
+ * @brief struct returned by the initialization function of the plugin
+ */
+struct Plugin
+{
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+};
+
+const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+struct RequestHandle
+{
+ /**
+ * Handle to Credential service.
+ */
+ struct GNUNET_CREDENTIAL_Handle *credential;
+
+ /**
+ * Handle to lookup request
+ */
+ struct GNUNET_CREDENTIAL_Request *verify_request;
+
+ /**
+ * Handle to issue request
+ */
+ struct GNUNET_CREDENTIAL_Request *issue_request;
+
+ /**
+ * Handle to identity
+ */
+ struct GNUNET_IDENTITY_Handle *identity;
+
+ /**
+ * Handle to identity operation
+ */
+ struct GNUNET_IDENTITY_Operation *id_op;
+
+ /**
+ * Handle to ego lookup
+ */
+ struct GNUNET_IDENTITY_EgoLookup *ego_lookup;
+
+ /**
+ * Handle to rest request
+ */
+ struct GNUNET_REST_RequestHandle *rest_handle;
+
+ /**
+ * ID of a task associated with the resolution process.
+ */
+ struct GNUNET_SCHEDULER_Task * timeout_task;
+
+ /**
+ * The root of the received JSON or NULL
+ */
+ json_t *json_root;
+
+ /**
+ * The plugin result processor
+ */
+ GNUNET_REST_ResultProcessor proc;
+
+ /**
+ * The closure of the result processor
+ */
+ void *proc_cls;
+
+ /**
+ * The issuer attribute to verify
+ */
+ char *issuer_attr;
+
+ /**
+ * The subject attribute
+ */
+ char *subject_attr;
+
+ /**
+ * The public key of the issuer
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey issuer_key;
+
+ /**
+ * The public key of the subject
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey subject_key;
+
+ /**
+ * HTTP response code
+ */
+ int response_code;
+
+ /**
+ * Timeout
+ */
+ struct GNUNET_TIME_Relative timeout;
+
+};
+
+
+/**
+ * Cleanup lookup handle.
+ *
+ * @param handle Handle to clean up
+ */
+static void
+cleanup_handle (struct RequestHandle *handle)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Cleaning up\n");
+ if (NULL != handle->json_root)
+ json_decref (handle->json_root);
+
+ if (NULL != handle->issuer_attr)
+ GNUNET_free (handle->issuer_attr);
+ if (NULL != handle->subject_attr)
+ GNUNET_free (handle->subject_attr);
+ if (NULL != handle->verify_request)
+ GNUNET_CREDENTIAL_request_cancel (handle->verify_request);
+ if (NULL != handle->credential)
+ GNUNET_CREDENTIAL_disconnect (handle->credential);
+ if (NULL != handle->id_op)
+ GNUNET_IDENTITY_cancel (handle->id_op);
+ if (NULL != handle->ego_lookup)
+ GNUNET_IDENTITY_ego_lookup_cancel (handle->ego_lookup);
+ if (NULL != handle->identity)
+ GNUNET_IDENTITY_disconnect (handle->identity);
+ if (NULL != handle->timeout_task)
+ {
+ GNUNET_SCHEDULER_cancel (handle->timeout_task);
+ }
+ GNUNET_free (handle);
+}
+
+
+static void
+do_error (void *cls)
+{
+ struct RequestHandle *handle = cls;
+ struct MHD_Response *resp;
+
+ resp = GNUNET_REST_create_response (NULL);
+ handle->proc (handle->proc_cls, resp, handle->response_code);
+ cleanup_handle (handle);
+}
+
+/**
+ * Attribute delegation to JSON
+ *
+ * @param delegation_chain_entry the DSE
+ * @return JSON, NULL if failed
+ */
+static json_t*
+attribute_delegation_to_json (struct GNUNET_CREDENTIAL_Delegation *delegation_chain_entry)
+{
+ char *subject;
+ char *issuer;
+ json_t *attr_obj;
+
+ issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&delegation_chain_entry->issuer_key);
+ if (NULL == issuer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Issuer in delegation malformed\n");
+ return NULL;
+ }
+ subject = GNUNET_CRYPTO_ecdsa_public_key_to_string (&delegation_chain_entry->subject_key);
+ if (NULL == subject)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Subject in credential malformed\n");
+ GNUNET_free (issuer);
+ return NULL;
+ }
+ attr_obj = json_object ();
+
+ json_object_set_new (attr_obj, "issuer", json_string (issuer));
+ json_object_set_new (attr_obj, "issuer_attribute",
+ json_string (delegation_chain_entry->issuer_attribute));
+
+ json_object_set_new (attr_obj, "subject", json_string (subject));
+ if (0 < delegation_chain_entry->subject_attribute_len)
+ {
+ json_object_set_new (attr_obj, "subject_attribute",
+ json_string (delegation_chain_entry->subject_attribute));
+ }
+ GNUNET_free (issuer);
+ GNUNET_free (subject);
+ return attr_obj;
+}
+
+/**
+ * JSONAPI resource to Credential
+ *
+ * @param res the JSONAPI resource
+ * @return the resulting credential, NULL if failed
+ */
+static struct GNUNET_CREDENTIAL_Credential*
+json_to_credential (json_t *res)
+{
+ struct GNUNET_CREDENTIAL_Credential *cred;
+ json_t *tmp;
+ const char *attribute;
+ const char *signature;
+ char *sig;
+
+ tmp = json_object_get (res, "attribute");
+ if (0 == json_is_string (tmp))
+ {
+ return NULL;
+ }
+ attribute = json_string_value (tmp);
+ cred = GNUNET_malloc (sizeof (struct GNUNET_CREDENTIAL_Credential)
+ + strlen (attribute));
+ cred->issuer_attribute = attribute;
+ cred->issuer_attribute_len = strlen (attribute);
+ tmp = json_object_get (res, "issuer");
+ if (0 == json_is_string (tmp))
+ {
+ GNUNET_free (cred);
+ return NULL;
+ }
+
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (json_string_value(tmp),
+ strlen (json_string_value(tmp)),
+ &cred->issuer_key);
+ tmp = json_object_get (res, "subject");
+ if (0 == json_is_string (tmp))
+ {
+ GNUNET_free (cred);
+ return NULL;
+ }
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (json_string_value(tmp),
+ strlen (json_string_value(tmp)),
+ &cred->subject_key);
+
+ tmp = json_object_get (res, "signature");
+ if (0 == json_is_string (tmp))
+ {
+ GNUNET_free (cred);
+ return NULL;
+ }
+ signature = json_string_value (tmp);
+ GNUNET_STRINGS_base64_decode (signature,
+ strlen (signature),
+ (char**)&sig);
+ GNUNET_memcpy (&cred->signature,
+ sig,
+ sizeof (struct GNUNET_CRYPTO_EcdsaSignature));
+ GNUNET_free (sig);
+
+ tmp = json_object_get (res, "expiration");
+ if (0 == json_is_integer (tmp))
+ {
+ GNUNET_free (cred);
+ return NULL;
+ }
+ cred->expiration.abs_value_us = json_integer_value (tmp);
+ return cred;
+}
+
+
+/**
+ * Credential to JSON
+ *
+ * @param cred the credential
+ * @return the resulting json, NULL if failed
+ */
+static json_t*
+credential_to_json (struct GNUNET_CREDENTIAL_Credential *cred)
+{
+ char *issuer;
+ char *subject;
+ char *signature;
+ char attribute[cred->issuer_attribute_len + 1];
+ json_t *cred_obj;
+
+ issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->issuer_key);
+ if (NULL == issuer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Issuer in credential malformed\n");
+ return NULL;
+ }
+ subject = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->subject_key);
+ if (NULL == subject)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Subject in credential malformed\n");
+ GNUNET_free (issuer);
+ return NULL;
+ }
+ GNUNET_STRINGS_base64_encode ((char*)&cred->signature,
+ sizeof (struct GNUNET_CRYPTO_EcdsaSignature),
+ &signature);
+ GNUNET_memcpy (attribute,
+ cred->issuer_attribute,
+ cred->issuer_attribute_len);
+ attribute[cred->issuer_attribute_len] = '\0';
+ cred_obj = json_object ();
+ json_object_set_new (cred_obj, "issuer", json_string (issuer));
+ json_object_set_new (cred_obj, "subject", json_string (subject));
+ json_object_set_new (cred_obj, "attribute", json_string (attribute));
+ json_object_set_new (cred_obj, "signature", json_string (signature));
+ json_object_set_new (cred_obj, "expiration", json_integer (cred->expiration.abs_value_us));
+ GNUNET_free (issuer);
+ GNUNET_free (subject);
+ GNUNET_free (signature);
+ return cred_obj;
+}
+
+static void
+handle_collect_response (void *cls,
+ unsigned int d_count,
+ struct GNUNET_CREDENTIAL_Delegation *delegation_chain,
+ unsigned int c_count,
+ struct GNUNET_CREDENTIAL_Credential *cred)
+{
+ struct RequestHandle *handle = cls;
+ struct MHD_Response *resp;
+ struct GNUNET_JSONAPI_Document *json_document;
+ struct GNUNET_JSONAPI_Resource *json_resource;
+ json_t *cred_obj;
+ json_t *cred_array;
+ char *result;
+ char *issuer;
+ char *id;
+ uint32_t i;
+
+ handle->verify_request = NULL;
+ if (NULL == cred) {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Verify failed.\n");
+ handle->response_code = MHD_HTTP_NOT_FOUND;
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&handle->issuer_key);
+ if (NULL == issuer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Issuer in delegation malformed\n");
+ return;
+ }
+ GNUNET_asprintf (&id,
+ "%s.%s",
+ issuer,
+ handle->issuer_attr);
+ GNUNET_free (issuer);
+ json_document = GNUNET_JSONAPI_document_new ();
+ json_resource = GNUNET_JSONAPI_resource_new (GNUNET_REST_JSONAPI_CREDENTIAL_TYPEINFO,
+ id);
+ GNUNET_free (id);
+ cred_array = json_array ();
+ for (i=0;i<c_count;i++)
+ {
+ cred_obj = credential_to_json (&cred[i]);
+ json_array_append_new (cred_array, cred_obj);
+ }
+ GNUNET_JSONAPI_resource_add_attr (json_resource,
+ GNUNET_REST_JSONAPI_CREDENTIAL,
+ cred_array);
+ GNUNET_JSONAPI_document_resource_add (json_document, json_resource);
+ GNUNET_JSONAPI_document_serialize (json_document, &result);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result %s\n",
+ result);
+ json_decref (cred_array);
+ GNUNET_JSONAPI_document_delete (json_document);
+ resp = GNUNET_REST_create_response (result);
+ GNUNET_free(result);
+ handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
+ cleanup_handle (handle);
+}
+
+static void
+subject_ego_lookup (void *cls,
+ const struct GNUNET_IDENTITY_Ego *ego)
+{
+ struct RequestHandle *handle = cls;
+ const struct GNUNET_CRYPTO_EcdsaPrivateKey *sub_key;
+ handle->ego_lookup = NULL;
+
+ if (NULL == ego)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Subject not found\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ sub_key = GNUNET_IDENTITY_ego_get_private_key (ego);
+ handle->verify_request = GNUNET_CREDENTIAL_collect (handle->credential,
+ &handle->issuer_key,
+ handle->issuer_attr,
+ sub_key,
+ &handle_collect_response,
+ handle);
+}
+
+
+
+static void
+handle_verify_response (void *cls,
+ unsigned int d_count,
+ struct GNUNET_CREDENTIAL_Delegation *delegation_chain,
+ unsigned int c_count,
+ struct GNUNET_CREDENTIAL_Credential *cred)
+{
+
+ struct RequestHandle *handle = cls;
+ struct MHD_Response *resp;
+ struct GNUNET_JSONAPI_Document *json_document;
+ struct GNUNET_JSONAPI_Resource *json_resource;
+ json_t *cred_obj;
+ json_t *attr_obj;
+ json_t *cred_array;
+ json_t *attr_array;
+ char *result;
+ char *issuer;
+ char *id;
+ uint32_t i;
+
+ handle->verify_request = NULL;
+ if (NULL == cred) {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Verify failed.\n");
+ handle->response_code = MHD_HTTP_NOT_FOUND;
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&handle->issuer_key);
+ if (NULL == issuer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Issuer in delegation malformed\n");
+ return;
+ }
+ GNUNET_asprintf (&id,
+ "%s.%s",
+ issuer,
+ handle->issuer_attr);
+ GNUNET_free (issuer);
+ json_document = GNUNET_JSONAPI_document_new ();
+ json_resource = GNUNET_JSONAPI_resource_new (GNUNET_REST_JSONAPI_CREDENTIAL_TYPEINFO,
+ id);
+ GNUNET_free (id);
+ attr_array = json_array ();
+ for (i = 0; i < d_count; i++)
+ {
+ attr_obj = attribute_delegation_to_json (&delegation_chain[i]);
+ json_array_append_new (attr_array, attr_obj);
+ }
+ cred_array = json_array ();
+ for (i=0;i<c_count;i++)
+ {
+ cred_obj = credential_to_json (&cred[i]);
+ json_array_append_new (cred_array, cred_obj);
+ }
+ GNUNET_JSONAPI_resource_add_attr (json_resource,
+ GNUNET_REST_JSONAPI_CREDENTIAL,
+ cred_array);
+ GNUNET_JSONAPI_resource_add_attr (json_resource,
+ GNUNET_REST_JSONAPI_DELEGATIONS,
+ attr_array);
+ GNUNET_JSONAPI_document_resource_add (json_document, json_resource);
+ GNUNET_JSONAPI_document_serialize (json_document, &result);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result %s\n",
+ result);
+ json_decref (attr_array);
+ json_decref (cred_array);
+ GNUNET_JSONAPI_document_delete (json_document);
+ resp = GNUNET_REST_create_response (result);
+ handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
+ GNUNET_free (result);
+ cleanup_handle (handle);
+}
+
+static void
+collect_cred_cont (struct GNUNET_REST_RequestHandle *conndata_handle,
+ const char* url,
+ void *cls)
+{
+ struct RequestHandle *handle = cls;
+ struct GNUNET_HashCode key;
+ char *tmp;
+ char *entity_attr;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting...\n");
+ handle->credential = GNUNET_CREDENTIAL_connect (cfg);
+ handle->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->timeout,
+ &do_error, handle);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connected\n");
+ if (NULL == handle->credential)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Connecting to CREDENTIAL failed\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (conndata_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing issuer attribute\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = GNUNET_CONTAINER_multihashmap_get (conndata_handle->url_param_map,
+ &key);
+ entity_attr = GNUNET_strdup (tmp);
+ tmp = strtok(entity_attr, ".");
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed issuer or attribute\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (tmp,
+ strlen (tmp),
+ &handle->issuer_key))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed issuer key\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = strtok (NULL, "."); //Issuer attribute
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed attribute\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ handle->issuer_attr = GNUNET_strdup (tmp);
+ GNUNET_free (entity_attr);
+
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_EGO,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_EGO),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (conndata_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing subject\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = GNUNET_CONTAINER_multihashmap_get (conndata_handle->url_param_map,
+ &key);
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed subject\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ handle->ego_lookup = GNUNET_IDENTITY_ego_lookup (cfg,
+ tmp,
+ &subject_ego_lookup,
+ handle);
+}
+
+
+
+static void
+verify_cred_cont (struct GNUNET_REST_RequestHandle *conndata_handle,
+ const char* url,
+ void *cls)
+{
+ struct RequestHandle *handle = cls;
+ struct GNUNET_HashCode key;
+ struct GNUNET_JSONAPI_Document *json_obj;
+ struct GNUNET_JSONAPI_Resource *res;
+ struct GNUNET_CREDENTIAL_Credential *cred;
+ char *tmp;
+ char *entity_attr;
+ int i;
+ uint32_t credential_count;
+ uint32_t resource_count;
+ json_t *cred_json;
+ json_t *data_js;
+ json_error_t err;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting...\n");
+ handle->credential = GNUNET_CREDENTIAL_connect (cfg);
+ handle->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->timeout,
+ &do_error, handle);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connected\n");
+ if (NULL == handle->credential)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Connecting to CREDENTIAL failed\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (conndata_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing issuer attribute\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = GNUNET_CONTAINER_multihashmap_get (conndata_handle->url_param_map,
+ &key);
+ entity_attr = GNUNET_strdup (tmp);
+ tmp = strtok(entity_attr, ".");
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed issuer or attribute\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (tmp,
+ strlen (tmp),
+ &handle->issuer_key))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed issuer key\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = strtok (NULL, "."); //Issuer attribute
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed attribute\n");
+ GNUNET_free (entity_attr);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ handle->issuer_attr = GNUNET_strdup (tmp);
+ GNUNET_free (entity_attr);
+
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_KEY,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_KEY),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (conndata_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing subject key\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = GNUNET_CONTAINER_multihashmap_get (conndata_handle->url_param_map,
+ &key);
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed subject\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (tmp,
+ strlen (tmp),
+ &handle->subject_key)) {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed subject key\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+
+ if (0 >= handle->rest_handle->data_size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing credentials\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+
+ struct GNUNET_JSON_Specification docspec[] = {
+ GNUNET_JSON_spec_jsonapi_document (&json_obj),
+ GNUNET_JSON_spec_end()
+ };
+ char term_data[handle->rest_handle->data_size+1];
+ term_data[handle->rest_handle->data_size] = '\0';
+ credential_count = 0;
+ GNUNET_memcpy (term_data,
+ handle->rest_handle->data,
+ handle->rest_handle->data_size);
+ data_js = json_loads (term_data,
+ JSON_DECODE_ANY,
+ &err);
+ GNUNET_assert (GNUNET_OK == GNUNET_JSON_parse (data_js, docspec,
+ NULL, NULL));
+ json_decref (data_js);
+ if (NULL == json_obj)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unable to parse JSONAPI Object from %s\n",
+ term_data);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+
+ resource_count = GNUNET_JSONAPI_document_resource_count(json_obj);
+ GNUNET_assert (1 == resource_count);
+ res = (GNUNET_JSONAPI_document_get_resource(json_obj, 0));
+ if (GNUNET_NO == GNUNET_JSONAPI_resource_check_type(res,
+ GNUNET_REST_JSONAPI_CREDENTIAL_TYPEINFO))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Resource not a credential!\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unable to parse JSONAPI Object from %s\n",
+ term_data);
+ GNUNET_JSONAPI_document_delete (json_obj);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ cred_json = GNUNET_JSONAPI_resource_read_attr (res,
+ GNUNET_REST_JSONAPI_CREDENTIAL);
+
+ GNUNET_assert (json_is_array (cred_json));
+
+ credential_count = json_array_size(cred_json);
+
+ struct GNUNET_CREDENTIAL_Credential credentials[credential_count];
+ for (i=0;i<credential_count;i++)
+ {
+ cred = json_to_credential (json_array_get (cred_json, i));
+ if (NULL == cred)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unable to parse credential!\n");
+ continue;
+ }
+ GNUNET_memcpy (&credentials[i],
+ cred,
+ sizeof (struct GNUNET_CREDENTIAL_Credential));
+ credentials[i].issuer_attribute = GNUNET_strdup (cred->issuer_attribute);
+ GNUNET_free (cred);
+ }
+ GNUNET_JSONAPI_document_delete(json_obj);
+ handle->verify_request = GNUNET_CREDENTIAL_verify (handle->credential,
+ &handle->issuer_key,
+ handle->issuer_attr,
+ &handle->subject_key,
+ credential_count,
+ credentials,
+ &handle_verify_response,
+ handle);
+ for (i=0;i<credential_count;i++)
+ GNUNET_free ((char*)credentials[i].issuer_attribute);
+
+}
+
+void
+send_cred_response (struct RequestHandle *handle,
+ struct GNUNET_CREDENTIAL_Credential *cred)
+{
+ struct MHD_Response *resp;
+ struct GNUNET_JSONAPI_Document *json_document;
+ struct GNUNET_JSONAPI_Resource *json_resource;
+ json_t *cred_obj;
+ char *result;
+ char *issuer;
+ char *subject;
+ char *signature;
+ char *id;
+
+ GNUNET_assert (NULL != cred);
+ issuer = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->issuer_key);
+ if (NULL == issuer)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Subject malformed\n");
+ GNUNET_free (issuer);
+ return;
+ }
+ GNUNET_asprintf (&id,
+ "%s.%s",
+ issuer,
+ (char*)&cred[1]);
+ subject = GNUNET_CRYPTO_ecdsa_public_key_to_string (&cred->subject_key);
+ if (NULL == subject)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Subject malformed\n");
+ GNUNET_free (id);
+ GNUNET_free (issuer);
+ return;
+ }
+ GNUNET_STRINGS_base64_encode ((char*)&cred->signature,
+ sizeof (struct GNUNET_CRYPTO_EcdsaSignature),
+ &signature);
+ json_document = GNUNET_JSONAPI_document_new ();
+ json_resource = GNUNET_JSONAPI_resource_new (GNUNET_REST_JSONAPI_CREDENTIAL_TYPEINFO,
+ id);
+ GNUNET_free (id);
+ cred_obj = json_object();
+ json_object_set_new (cred_obj, "issuer", json_string (issuer));
+ json_object_set_new (cred_obj, "subject", json_string (subject));
+ json_object_set_new (cred_obj, "expiration", json_integer( cred->expiration.abs_value_us));
+ json_object_set_new (cred_obj, "signature", json_string (signature));
+ GNUNET_JSONAPI_resource_add_attr (json_resource,
+ GNUNET_REST_JSONAPI_CREDENTIAL,
+ cred_obj);
+ GNUNET_JSONAPI_document_resource_add (json_document, json_resource);
+ GNUNET_JSONAPI_document_serialize (json_document, &result);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result %s\n",
+ result);
+ json_decref (cred_obj);
+ GNUNET_JSONAPI_document_delete (json_document);
+ resp = GNUNET_REST_create_response (result);
+ handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
+ GNUNET_free (result);
+ GNUNET_free (signature);
+ GNUNET_free (issuer);
+ GNUNET_free (subject);
+ cleanup_handle (handle);
+}
+
+void
+get_cred_issuer_cb (void *cls,
+ struct GNUNET_IDENTITY_Ego *ego,
+ void **ctx,
+ const char *name)
+{
+ struct RequestHandle *handle = cls;
+ struct GNUNET_TIME_Absolute etime_abs;
+ struct GNUNET_TIME_Relative etime_rel;
+ const struct GNUNET_CRYPTO_EcdsaPrivateKey *issuer_key;
+ struct GNUNET_HashCode key;
+ struct GNUNET_CREDENTIAL_Credential *cred;
+ char* expiration_str;
+ char* tmp;
+
+ handle->id_op = NULL;
+
+ if (NULL == name)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Issuer not configured!\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to credential service...\n");
+ handle->credential = GNUNET_CREDENTIAL_connect (cfg);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connected\n");
+ if (NULL == handle->credential)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Connecting to CREDENTIAL failed\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_EXPIRATION,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_EXPIRATION),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing expiration\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ expiration_str = GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map,
+ &key);
+ if ( NULL == expiration_str )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Expiration malformed\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+
+ if (GNUNET_OK == GNUNET_STRINGS_fancy_time_to_relative (expiration_str,
+ &etime_rel))
+ {
+ etime_abs = GNUNET_TIME_relative_to_absolute (etime_rel);
+ } else if (GNUNET_OK != GNUNET_STRINGS_fancy_time_to_absolute (expiration_str,
+ &etime_abs))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed expiration: %s\n", expiration_str);
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_ISSUER_ATTR),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing issuer attribute\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ handle->issuer_attr = GNUNET_strdup(GNUNET_CONTAINER_multihashmap_get
+ (handle->rest_handle->url_param_map,
+ &key));
+ GNUNET_CRYPTO_hash (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_KEY,
+ strlen (GNUNET_REST_JSONAPI_CREDENTIAL_SUBJECT_KEY),
+ &key);
+ if ( GNUNET_NO ==
+ GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle->url_param_map,
+ &key) )
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Missing subject\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ tmp = GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map,
+ &key);
+ if (NULL == tmp)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed subject\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecdsa_public_key_from_string (tmp,
+ strlen (tmp),
+ &handle->subject_key)) {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Malformed subject key\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ issuer_key = GNUNET_IDENTITY_ego_get_private_key (ego);
+ cred = GNUNET_CREDENTIAL_credential_issue (issuer_key,
+ &handle->subject_key,
+ handle->issuer_attr,
+ &etime_abs);
+ if (NULL == cred)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Failed to create credential\n");
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ return;
+ }
+ send_cred_response (handle, cred);
+}
+
+
+static void
+issue_cred_cont (struct GNUNET_REST_RequestHandle *conndata_handle,
+ const char* url,
+ void *cls)
+{
+ struct RequestHandle *handle = cls;
+
+ handle->identity = GNUNET_IDENTITY_connect (cfg,
+ NULL,
+ NULL);
+ handle->id_op = GNUNET_IDENTITY_get(handle->identity,
+ "credential-issuer",
+ &get_cred_issuer_cb,
+ handle);
+ handle->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->timeout,
+ &do_error,
+ handle);
+}
+
+static void
+options_cont (struct GNUNET_REST_RequestHandle *con_handle,
+ const char* url,
+ void *cls)
+{
+ struct MHD_Response *resp;
+ struct RequestHandle *handle = cls;
+
+ //For GNS, independent of path return all options
+ resp = GNUNET_REST_create_response (NULL);
+ MHD_add_response_header (resp,
+ "Access-Control-Allow-Methods",
+ MHD_HTTP_METHOD_GET);
+ handle->proc (handle->proc_cls,
+ resp,
+ MHD_HTTP_OK);
+ cleanup_handle (handle);
+}
+
+
+static void
+rest_credential_process_request(struct GNUNET_REST_RequestHandle *conndata_handle,
+ GNUNET_REST_ResultProcessor proc,
+ void *proc_cls)
+{
+ struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
+ struct GNUNET_REST_RequestHandlerError err;
+
+ handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+ handle->proc_cls = proc_cls;
+ handle->proc = proc;
+ handle->rest_handle = conndata_handle;
+
+ static const struct GNUNET_REST_RequestHandler handlers[] = {
+ {MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_CREDENTIAL_VERIFY, &verify_cred_cont},
+ {MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_CREDENTIAL_COLLECT, &collect_cred_cont},
+ {MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_CREDENTIAL_ISSUE, &issue_cred_cont},
+ {MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_CREDENTIAL, &options_cont},
+ GNUNET_REST_HANDLER_END
+ };
+
+ if (GNUNET_NO == GNUNET_JSONAPI_handle_request (conndata_handle,
+ handlers,
+ &err,
+ handle))
+ {
+ handle->response_code = err.error_code;
+ GNUNET_SCHEDULER_add_now (&do_error, handle);
+ }
+}
+
+
+/**
+ * Entry point for the plugin.
+ *
+ * @param cls the "struct GNUNET_NAMESTORE_PluginEnvironment*"
+ * @return NULL on error, otherwise the plugin context
+ */
+void *
+libgnunet_plugin_rest_credential_init (void *cls)
+{
+ static struct Plugin plugin;
+ cfg = cls;
+ struct GNUNET_REST_Plugin *api;
+
+ if (NULL != plugin.cfg)
+ return NULL; /* can only initialize once! */
+ memset (&plugin, 0, sizeof (struct Plugin));
+ plugin.cfg = cfg;
+ api = GNUNET_new (struct GNUNET_REST_Plugin);
+ api->cls = &plugin;
+ api->name = GNUNET_REST_API_NS_CREDENTIAL;
+ api->process_request = &rest_credential_process_request;
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("GNS REST API initialized\n"));
+ return api;
+}
+
+
+/**
+ * Exit point from the plugin.
+ *
+ * @param cls the plugin context (as returned by "init")
+ * @return always NULL
+ */
+void *
+libgnunet_plugin_rest_credential_done (void *cls)
+{
+ struct GNUNET_REST_Plugin *api = cls;
+ struct Plugin *plugin = api->cls;
+
+ plugin->cfg = NULL;
+ GNUNET_free (api);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "GNS REST plugin is finished\n");
+ return NULL;
+}
+
+/* end of plugin_rest_gns.c */